Date validation on applet level, after implementation per script Siebel application crashes

Hi all,

our client requires a date validation on the applet level, so for example:

Primary Revenue Date has to be greater than or equal to the current date for two applets (say A and and less than or equal the current time one applet (say C) where this date has to be validated.

If the Primary Revenue Date is less than the current date on applets A and B, the user has to get an error message, e.g. "The Pr Rev Date has to be greater than or equal to the current time" or not to allow the user to save that date when this criterion is not fulfilled.